ALtOGKOSTA. 95 



Length, Ak in in. 



Described froui a unique rT in the Indian Museiun taken by 

 me at Darjiling, 7000 ft., 29. v. 1910. I t'ouud the species uot 

 uncommon at Hankow, China, 22-26. iv. 1906. 



64. AUogiiosta assamensis, sp. nov. 



5 . Head as broad as thorax ; frons very retreating, slightly 

 swollen on upper corners, where it projects above eyes in profile, 

 forming half width of head, black, shining, parallel -sided, closely 

 punctulate, and with ahnost microscopic brownish pubescence; 

 lower part smootli, vertical triangle small and low; ocelli incon- 

 spicuous ; face as broad as frons, sides parallel, shining black, bare ; 

 two large, dull grey tomentose spots placed diagonally just below 

 base of antennas, their upper corners nearly touching; proboscis 

 brownish black, palpi black, rather long ; occiput black; eyes bare, 

 small, only a little over half height of head ; posterior orbits on 

 upper lialf only, rapidly diminishing and disappearing at about 

 middle of eye. Antennae placed below middle of head in profile ; 

 first two joints subequal, cylindrical, pale yellow; 3rd with eight 

 annulations, Jst aunulatiou broadest and longest; basal jmrt of 

 fiagellum brownish yellow, gradually becoming blackish at tip. 

 Thorax subquadrate, barely wider behind, front corners rather 

 angular, hind corners cut away by the very distinct brown posterior 

 calli ; dorsum thickly punctulate, with very short soft vellowish- 

 brown pubescence; the moderate-sized semicircular scutellum and 

 the pleurse similarly clothed, black ; a broad yellowish-white stripe 

 on upper part of latter from anterior margin to wing-base; meta- 

 notum small, dull brown. Abdomen 8-segmented, practically 

 bare; 1st and 2nd segments almost coalescent, 6th distinctly 

 narrower than 5th, and the 7th and 8th narrower than 6th ; all 

 blackish brown, or even slightly violet-tinged; middle half of 1st, 

 2nd, and 3rd yellowish (the pale part probably variable in extent); 

 venter mainly yellowish, but blackish at sides and tip. Le(js mainly 

 yellow; apical three-fourths of fi-ont tibiae and all front tarsi, last 

 three joints of middle tarsi, apical half of hind femora, hind tibiae 

 (except narrowly at base), and last two joints of hind tarsi black. 

 Wings pale smoke-grey, a very little darker at tip ; stigma large, 

 black, conspicuous, clearly demarcated and filling all marginal cell 

 except extreme tij), which is slightly yellowish, as is also the 

 posta for a very short distance at this point ; 1st submarginal cell 

 practically clear, except at the very narrow base and extreme tip, 

 thus in striking contrast to the dark contiguous stigma ; extreme 

 base of wing clear; 5th and 6th veins yellow, remainder dark 

 brown ; halteres with stem yellowish white, clubs large, oval, 

 black. 



Length barely 5 mm. 



Described from a single $ in the Indian Museum from above 

 Tura, Garo Hills, Assam, 3500-3900 ft., viii. 1917 {Knn^^). 



